diff options
Diffstat (limited to 'qemu-img.texi')
| -rw-r--r-- | qemu-img.texi | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/qemu-img.texi b/qemu-img.texi index 72dabd6b3e..90c7eab4a8 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -244,6 +244,9 @@ only the differences from @var{backing_file}. No size needs to be specified in this case. @var{backing_file} will never be modified unless you use the @code{commit} monitor command (or qemu-img commit). +If a relative path name is given, the backing file is looked up relative to +the directory containing @var{filename}. + Note that a given backing file will be opened to check that it is valid. Use the @code{-u} option to enable unsafe backing file mode, which means that the image will be created even if the associated backing file cannot be opened. A @@ -343,6 +346,9 @@ created as a copy on write image of the specified base image; the @var{backing_file} should have the same content as the input's base image, however the path, image format, etc may differ. +If a relative path name is given, the backing file is looked up relative to +the directory containing @var{output_filename}. + If the @code{-n} option is specified, the target volume creation will be skipped. This is useful for formats such as @code{rbd} if the target volume has already been created with site specific options that cannot @@ -490,6 +496,9 @@ The backing file is changed to @var{backing_file} and (if the image format of string), then the image is rebased onto no backing file (i.e. it will exist independently of any backing file). +If a relative path name is given, the backing file is looked up relative to +the directory containing @var{filename}. + @var{cache} specifies the cache mode to be used for @var{filename}, whereas @var{src_cache} specifies the cache mode for reading backing files. |